Continuity mistake: There's a scene where Oldman is talking to his wife (Anabella Sciorra) in the kitchen. He is sitting at the table on which there's a candle. In one scene the candle is lit, in the next it has gone out. It also switched between flickering and staying still.
Visible crew/equipment: In the scene where Jack and some other characters are sitting around a table at a pub/restaurant and discussing something, you can see that there's a microphone sticking out from above. (From a video viewing.)